Visible light just passes over them.

光只会穿过它们。

Infrared has a longer wavelength than visible light.

红外线的波长光更长。

But in visible light the planet looks almost featureless.

但光下裸眼观看，这颗行星看起来就几乎毫无特色。

The wavelengths we see through our eyes, we call visible light.

我们通过眼睛看到的波长，我们称之为光。

That energy is emitted as photons of visible light.

能量以光的光子形式发射。

Its neutrinos reached Earth about three hours ahead of the visible light.

这些中微子光提前三小时抵达地球。

The exoplanet Fomalhaut b was the first one photographed with visible light.

这个名为“北落师门b”的系外行星是第一个用视光拍到的行星。

Just like visible light, x-rays are less likely to penetrate denser materials.

类似于光，X线难以穿过密度高的物体。

There, they absorb infrared radiation and convert it to visible green light.

那里，它们吸收红外辐射，并将其转化为的绿光。

This pulse can be detected in visible light, radio waves, and even X-rays!

这种脉冲以光、无线电波、甚至X射线中被探测到！

There are clouds, but again they're difficult to see in visible light.

天王星的有云团环绕，但同样的，光下很难看到。

This is what we call “visible light, ” also known as the visible spectrum.

这就是我们所说的“光”，又叫光谱。

At the lower end of the spectrum, there's radio, infrared, and visible light.

光谱的低频端的是无线电，红外线，和光。

Together with visible light, all these types of radiation are called the electromagnetic spectrum.

同光一起，所有类型的辐射都叫做电磁频谱。

And finally, we arrive back thirteen billion years ago, at the beginning of visible light.

最后，我们抵达 130 亿前抵达光的起源。

We call this kind of light visible light.

我们称这种光为光。

A typical optical telescope has a diameter a few million times the wavelength of visible light.

传统的光学望远镜的直径是光波长的数百万倍。

Together, all the colors make up the spectrum of visible light—the light we can see.

所有的颜色一起构成了光的光谱——我们所能看到的光。

Furthermore, it lies behind a shroud of dust that blocks any visible light from passing through.

此外它前面还有一层阻隔任何光线通过的尘埃。

Radio waves pass right around “normal” telescopes, ones that we use to observe visible light.

无线电波会从我们用来观测光的“普通”望远镜周边穿过。